Results 101 to 110 of about 3,204,513 (373)
Magnetic properties of substitutional Mn in (110) GaAs surface and subsurface layers
, 2009 Motivated by recent STM experiments, we present a theoretical study of the electronic and magnetic properties of the Mn-induced acceptor level obtained by substituting a single Ga atom in the (110) surface layer of GaAs or in one of the atoms layers ...
A. H. MacDonald +4 more
core +1 more source
Estimation of subsurface porosities and thermal conductivities of polygonal tundra by coupled inversion of electrical resistivity, temperature, and moisture content data [PDF]
, 2020 Studies indicate greenhouse gas emissions following permafrost thaw will amplify current rates of atmospheric warming, a process referred to as the permafrost carbon feedback.
Atchley, AL +7 more
core +2 more sources
Hydrocarbon seepage in the deep seabed links subsurface and seafloor biospheres
Proceedings of the National Academy of Sciences of the United States of America, 2020 Significance The marine subsurface is one of the largest habitats on Earth composed exclusively of microorganisms and harboring on the order of 1029 microbial cells.
Anirban Chakraborty +8 more
semanticscholar +1 more source
Ti6Al4V‐Bioglass‐Copper Composites for Load‐Bearing Implants
Advanced Healthcare Materials, EarlyView.We have designed and manufactured a novel Ti64‐based composite by adding 45S5 bioglass (BG) and copper (Cu). Adding BG on titanium improves wear resistance and biocompatibility, whereas Cu addition improves mechanical strength while providing inherent lifelong bacterial resistance.
Lochan Upadhayay +3 more
wiley +1 more source
Frontiers in Microbiology, 2015 Gas seeps emanating from ophiolites at Yanartaş (Chimaera), Turkey, have been documented for thousands of years. Active serpentinization produces hydrogen and a range of carbon gases that may provide fuel for life.
D'Arcy Renee Meyer-Dombard +6 more
doaj +1 more source
Fracture porosity in the deep subsurface
, 2022 Fracture patterns (pen, fill or open-fill) and attributes (fracture aperture and porosity) governs fluid flow and rock strength, and have important effect on reservoir behavior and performance. How to detect the fractured zones and characterize the fracture properties including fracture aperture and porosity have long been a challenging topic in the ...
Jin, Lai, Guiwen, Wang
openaire +1 more source
Bacterial diversity in a deep-subsurface clay environment [PDF]
Applied and Environmental Microbiology, 1996 The presence of bacteria in a deep clay sediment was analyzed in a 20-m-long core horizontally drilled from a mine gallery at a depth of 224 m in the Boom clay formation (Mol, Belgium). This clay deposit is the result of a marine sedimentary process that occurred 35 million years ago. Bacterial activities were estimated by measuring respiration on [14C]
V, Boivin-Jahns +4 more
openaire +2 more sources
Advanced Healthcare Materials, EarlyView.Over half of cancer patients undergo radiotherapy. Laser ablation enabled the synthesis of immiscible Au‐Fe‐B nanoparticles designed as degradable bimodal radiosensitizers for X‐ray radiotherapy (XRT), boron neutron capture therapy (BNCT), and bimodal imaging for X‐ray computed tomography (CT) and magnetic resonance imaging (MRI). These nanosensitizers
Michael Bissoli +15 more
wiley +1 more source
Origin of Deep Acoustic Sources Associated with Solar Magnetic Structures
, 2018 It is generally accepted that solar acoustic (p) modes are excited by near-surface turbulent motions, in particular, by downdrafts and interacting vortices in intergranular lanes.
Kitiashvili, Irina N. +4 more
core +1 more source
Evidence for High Rates of Gas Transport in the Deep Subsurface
Geophysical Research Letters, 2019 Barometric pumping caused by atmospheric pressure fluctuations contributes to the motion of gases in the vadose zone. While the resulting gas transport is often negligible in unfractured porous rocks, rates of transport in fractured media can be ...
P. H. Stauffer +6 more
semanticscholar +1 more source